138051827549 has 8 divisors (see below), whose sum is σ = 139610163000. Its totient is φ = 136496249856.

The previous prime is 138051827513. The next prime is 138051827603. The reversal of 138051827549 is 945728150831.

It can be written as a sum of positive squares in 4 ways, for example, as 52032803449 + 86019024100 = 228107^2 + 293290^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138051827549 - 2¹² = 138051823453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138051827549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138051827509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588674 + ... + 789075.

It is an arithmetic number, because the mean of its divisors is an integer number (17451270375).

Almost surely, 2^138051827549 is an apocalyptic number.

It is an amenable number.

138051827549 is a deficient number, since it is larger than the sum of its proper divisors (1558335451).

138051827549 is a wasteful number, since it uses less digits than its factorization.

138051827549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378879.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 138051827549 in words is "one hundred thirty-eight billion, fifty-one million, eight hundred twenty-seven thousand, five hundred forty-nine".